his death leaves behind a power vacuum and is considered a big victory for the taliban, ann? >> thank you so much. >>> another milestone up in space today as two residents of the international space station stepped outside to retrieve a broken ammonia pump so it could be returned to earth for examination. it was the final space walk of the american shuttle era. meantime, the landing plan for the atlantis has changed and it's now scheduled to touch down before dawn on july 21st at the kennedy space center. >>> poignant moments in palm desert, california, where representatives of the current and previous first families attended a memorial service for betty ford, who died friday at the age of 93. our own brian williams is there and we'll hear from him in a bit. but nbc's lee cowan joins us, lee? >> reporter: hey, ann. this is the first of two tributes in two different states for betty ford and in keeping with her very take-charge attitude she was very specific about how she wanted to be remembered. to that end, both politics and her passion for people were front and center. >> r